<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<my-search @myclick="gotoSearch"></my-search>   
		<view class="scroll-view-container">
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh+ 'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view @click="activeChange(index)" :class="['left-scroll-view-item',index === active ? 'active': '']">{{item.cat_name}}</view>
				</block>
				
			</scroll-view>
			<scroll-view scroll-y="true" :style="{height: wh+ 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in catelevel2" :key="i2">
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3"
						@click="gotoGoodsList(item3)">
							<!-- <image :src="item3.cat_icon"></image> -->
							<image class="cate-lv3-img" src="/static/logo.png"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可用高度
				wh: 0,
				cateList:[],
				active:0,
				//二级分类列表
				catelevel2:[],
				// 滚动条距离顶部的距离
				scrollTop:0
			};
		},
		onLoad(){
			const sysInfo = uni.getSystemInfoSync()
			console.log(sysInfo)
			this.wh = sysInfo.windowHeight - 50
			this.getCateList()
		},
		methods:{
			//获取分类列表的数据
			async getCateList(){
				const {data: res} = await uni.$http.get('/api/public/v1/categories')
				// console.log(res)
				if(res.meta.status!== 200) return uni.$showMsg()
				this.cateList = res.message
				
				this.catelevel2 = res.message[0].children
			},
			activeChange(i){
				this.active = i
				
				//重新为二级分类赋值
				this.catelevel2 = this.cateList[i].children
				
				//切换一级菜单时，滚动条位置重置到顶部（会有1px误差）
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:"/subpkg/search/search"
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
}
.left-scroll-view{
	width: 120px;
	.left-scroll-view-item{
		background-color: #F7F7F7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;
		&.active{
			background-color: #FFFFFF;
			position: relative;
			&::before{
				content: ' ';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #C00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}
	}
}
.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			.cate-lv3-img{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
		}
	}
</style>
